I am a long time user of the Devolo 200MB AV+. It works ok but not well enough if you use internet all day long for work.I switched to the 500 hoping for improved performance. Well, it's a disappointment. The data transfer rate as well as the quality of the signal are exactly the same as the 200.Conclusion: unless you can test beforehand save your money and buy the 200AV serie.…more